Double-circuit instrument



(No Model.)

A. w. HALL.

I I DOUBLE CIRCUIT INSTRUMENT. Y NO. 284,840. Patented Sept. 11, 1883.

7 WITNESSES: VENTOR Mv M Y\. '5. WW

ATTORNEYS n In Ldhngmphnr. Washinglnll. 11C.

STATES NITE ALVAH NV. HAIJL, OF llIERIDEN, CONNECTICUT.

DOUBLE-CIRCUIT INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 284,840, datedSeptember 11, 1883.

Application filed May 1'1, 1883. No model.)

To all'whomf it may concern: 7

Be it known that I, ALVAH "W. HALL, a citizen of the United States,residing at Meriden, in the county of New Haven and State ofConnecticut, have invented new and useful Improvements in Double-CircuitInstruments, of which the following is a specification.

This invention relates to an improvement on the well known doublecircuit instrument which is described in Reissue No. 4,493, granted toThomas S. Hall, August 1, 1871, and which consists, essentially, of amain electro-magnet and its armature, a releasing; electro-magnet andits armature, and a locking-lever controlled by the armature of thereleasing electro-magnet, so that.when the main electro-magnet ismomentarily vitalized and its armature is attracted,'a circuit throughanother electromagnet is closed and retained by the lockinglever in aclosed condition, after the main electro-magnet ceases to be vitalized,until the re-' leasing electro-magnet isvitalized. With thearmature-lever of the main electro-magnet is further combined a rod,which carries one or more circuit-closing springs, so that when thearmature of the main electro-magnet is attracted one or more additionalcircuits are closed and maintained in a closed condition by thelockinglever until the releasing-magnet is vitalized.

My invention consists in the combination, with the main electro-magnetand its armature, and with the releasing-magnet, its armature, and thelocking device, of two or more tappets connected to the armature-leverof the main electro-magnet, and two or more circuitclosing springs actedupon in opposite directions by said tappets, so that when the mainelectro-magnet is temporarily vitalized, one or more circuits, which Iterm the advancing circuits, are closedand retained in this condition,and one or more other circuits, which I term the retreating circuits,are opened and retained in this condition until the releasing-magnet isvitalized, and that when the armature of the main electro-magnet isretracted the advancing circuit or circuits (previously closed) areopened and the retreating circuit or circuits are closed, the formerbeing retained in an open and the latter in a closed condition until themain electro magnet is again vitalized.

In the accompanying drawings, Figure 1 represents a side view of mydouble-circuit instrument. Fig. 2 is a plan or top view of the same.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates a base of wood or any othersuitable material, on which is secured the main electromagnet B. Fromsaid brace rises a bracket, 0, on which is secured the releasing-magnetD. The armature E of the main electro-magnet is secured to a lever, F,which is secured to a ro ck-shaft,

G, mounted in standards H, and the upper end of said lever F connects bya rod, I, with a lever, J, secured to a rock-shaft, K, which is mountedin standards L. The lower end of the lever J is pivoted to a rod, M,which moves in suitable guides, N, and from which rise a series oftappets, a, b, c, d, and e.

011 the base A are secured aseries of springs, ig h 1; is Z, and thecorresponding anvils, f g h The armature O of the releasing-magnet D issecured to a lever, P, secured to a rock-shaft,

Q, which is mounted in standards R, and the rear end of the lever P issubjected to the action of a retracting-spring, S. Vhen the main magnetis vitalized, its armature-lever F assumes the position shown in thedrawings, and the armature-lever P of the releasing-magnet catchesbehind it and maintains the same position even after the circuit throughthe main electro-magnet has been broken, and said arma- 8 5 ture-lever Fis not permitted to fall back until the releasing-magnet C is vitalized.

In the example shown in the drawings, the

springs i k Z act as retracting-springs for the armature E, the tensionof said springs being greater than that of the springs f g h,- but, ifdesired, a separate retracting-spring may be applied. Whenever thearmature of the main electro-magnet is attracted, and aslong as itslever F is maintained in the position shown in 9 5 the drawings, thesprings z is Z are held in contact with their anvils t" 70 Z by thetappets c d e, and circuits established through these springs aremaintained in a closed position until the armature-lever F is permittedto fall back. At the same time the springs f g h are open. WVhen thearinaturelever F is permitted to fall back, the springs 2' kl are openedand the springs f g h are closedby the tappets at b c, and maintained ina closed position until the main electro-magnet is again vitalized.Whenever the main electro-magnet B is vitalized, therefore, one or morecircuits are closed and maintained in a closed position, even after thecircuit through the main electro-magnet B has been broken, until thereleasing-magnet D is vitalized, and as soon as this is done the circuitor circuits which had been established through the springs i k larebroken and one or more new circuits are established through the springsf g h, and maintained in a closed condition until the mainelectro-magnet is again vitalized.

I distinctly disclaim the double instrument described in Reissue No.4,493, above named.

What I claim as new, and desire to secure by Letters Patent, is-

LVAH w. HALL. 14s.

' Vitnesses:

WV. HAUFF, E. F. KAsTENHUBER.

